import type { MappingTokens } from './controller-db';
import type { GamepadSlotSample } from './input-snapshot';
/**
 * Minimal raw Gamepad shape from browser API (no DOM types here).
 *
 * M3 F-2 seam fix: `id` mirrors the browser `Gamepad.id` string so the
 * remap lookup can derive the SDL GUID keyed by device identity (not by
 * slot index, which is unstable across reconnects).
 */
export interface RawGamepadStub {
    readonly index: number;
    readonly id: string;
    readonly connected: boolean;
    readonly mapping: string;
    readonly buttons: readonly {
        readonly value: number;
        readonly pressed: boolean;
    }[];
    readonly axes: readonly number[];
}
/**
 * Diff prev vs cur frames for all gamepad slots. Returns a flat
 * GamepadSlotSample[] array keyed by gamepad.index.
 *
 * - Standard-mapping slots produce GamepadSlotSample with edge sets filled
 *   from prev vs cur pressed-set delta.
 * - Non-standard slots: when `remapLookup` returns mapping tokens for the
 *   gamepad id, raw HID indices are re-projected onto the standard layout
 *   and the slot reports standardMapping=true (D-1 semantic redefinition).
 *   With no lookup or no match, the slot reports standardMapping=false with
 *   empty readpoints and connected=true (Feat1 behaviour, AC-04).
 * - Disconnected slots (in prev but not in cur) produce no entry: a slot
 *   absent from the sample reads as connected=false.
 * - Null entries in the browser getGamepads() array are skipped by the
 *   caller before calling this function.
 *
 * @param remapLookup - Optional acquisition-layer normalizer. Given a
 *   browser Gamepad.id, returns SDL mapping tokens or null. Only consulted
 *   for non-standard-mapping gamepads (D-1 option A).
 */
export declare function diffGamepadFrame(prev: ReadonlyMap<number, GamepadSlotSample>, curGamepads: readonly RawGamepadStub[], remapLookup?: (gamepadId: string) => MappingTokens | null): GamepadSlotSample[];
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